Improvement in sulky-cultivators



2 Sheets-Sheet 1.

R. B. ROBBINS.

SULKY-GULTIVATOR. Patented Mar. 7, 1 871.

[MWWMML 2 Sheets-Sheet 2.

'R. B. ROBBINS.

SULKYGULTIVATOR. No. 112,496. PatentedMa r. 7, 1871.

roots, "or.- other obstructions.

UNITED STATES PA ENT OFFICE.

RICHARD'B. ROBBINS, or ADR'IAN,.MIOHIGAN.'

' I MPROVEMENTlN SULKY-CULTIV'ATORS.

Specification forming part of Lctters Patent Kc. 112,496, dated ltlareh 7, 1871/ of Adrian, in the county of Leuawee and State of Michigan, have-invented a new and valuable Improvement in Sulky-Oultivators; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, refer-. ence being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon. l

Figure 1 of the drawings is a representation of a plan View of my cultivator. Fig. 2 is a central vertical section through the line 1 y. Fig. 3 is'a vertical section through. the line a x; Fig.4 is a partial rear View, showing the supplemental part H.

My invention relatesto means for cultivating corn andother: plants; audit consists inimprovements upon the common cultivator, whichare hereinafter particularly described. A of the drawings represents the neap, B-

the wheels, and C the'axle, of a sulky for that class of cultivators called straddle-row.

D D represent swinging frames, to which the plows are attached, and which areTeranged upon the metallic shank, by which the outer rail of a swinging frame is united with the pendent arms .of the cross-bar,and operates between said arm and the front end of said rail proper.' It will be observed that the metallic shank of this side rail is passed around said pendent arm in the form of a clasp, and

that the spring h encircles said shanklike-- wise in a clasp like manner. The office of the spring h is to aid in restoring the plow- -.frames to a direct line of draft whenever they may have been forced therefrom by stones, It will also be observed that while this spring h and the arrangement of claspinga pendent arm by the shank of an outer rail allows an outward swing to the plow-frame, the inner rail, being pivoted only for an upward and downward movement, prevents any swinging movement of the frame inward. This method of construction serves to protect the plants being cultivated from damage by the plows, while at the same time it permits a proper amountof vibratory motion to the frame to enable the operator to avoid small obstructions near the rows.

The letter n represents thedraw-bar, which passes through a wrist or sleeve at the bottom of a pendent arm, and isunited at its rear end to the bottom of the pivoted arm m.

The letter 0 is a rod connecting the top of arm m with one end ofthe equalizer 1). V

The devices last mentioned are duplicated.- upon the other frame D, and in conjunction serve the purpose of applying the draft mainly upon a direct line with the plow-frames, and also to equalize the same. I

My plows proper are usually constructed in the shovel form, and are attached to standyards in the ordinary manner.

The letter 3; represents a pulverizer, which consists of a strip of steel or. other hardened metal bent in the manner shown, and, being clasped aroundv the pldw-st'andard, is made secure under the plow,sor, rather, between the plow and the standard, its-represented on the The office of this pulverizer is to drawings. tear the clods and sods asunder and open the ridges formed by the plow. I sometimes construct the plow and the cultivator in one piece. This may be easily done, especially when they are formed by casting in molds or sand,

The letter H represents a supplemental plow and pulverizer attached to a standard,

and adapted by the cross-head Z to be operated between the frames D. This cross-head has. pins. at each end, which may be passed into suitable openings on the inner rails of- Having thus fully described my invention, In testimony that I claim the abii'ii'l have what I claim as new, and desire to secure by hereunto subscribed my name in thepresence Letters Patent, isr of two witnesses.

The spring h, connected with the shank of RICHARD B. ROBBINS. the side rail of the frame D, and the pendent \Vitnesses: arm of the cross-bar, and in combination there- WILLARD STEARNS,

.i with, substantially as specified. J. W. HELME. 

